20/400 Black Smooth Straight PP Cap / Unlined

Part 138330 gives development teams a focused basis for testing this packaging closure. It may fit briefs involving cosmetics, personal care, wellness, supplements, household, and specialty products. Even on the same neck finish, liner thickness and thread engagement can materially change seal performance. Prototype with the intended container and product to verify torque range, sealing, and consumer handling. Good component decisions here can prevent costly changes during scale-up.